I found this protractor head in a box of spokeshaves and planes a while back. It was almost impossible to use the way it was and finally got tired of looking at it yesterday. Not perfect but at least its usable now. Made by Bates MFG, any guesses as to its vintage? Disassembled everything but the level vial, I was afraid I may break it so I left it be. Soaked in evapo-rust for a few hours, then onto the brass brush and finished with wet sanding. I would have like to o a little farther with the polishing but I'm almost down to the markings so I had to stop.
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